Editing User:Mglerner (section)

== There is an issue with the freemol version of APBS shipped with PyMOL 1.2r2 for OS X. ==

=== Leopard and Snow Leopard (10.5 and 10.6) ===
There are three fairly easy ways to resolve it

1. Download and install the most recent (post Dec. 1 2009) version of APBS from [http://www.poissonboltzmann.org/apbs/downloads]. Then copy the apbs binary into the freemol directory (mv it to /Applications/PyMOLX11Hybrid.app/pymol/freemol/bin/apbs.exe, overwriting the version that comes installed with PyMOL).

2. Download [[File:Libgfortran.3.dylib.bz2]], unzip it ("bunzip2 libgfortran.3.dylib.gz2") and move it to /usr/local/lib ("mv libgfortran.3.dylib /usr/local/lib" ... on some machines, you may need "sudo mv libgfortran.3.dylib /usr/local/lib").

<source lang="bash">
bunzip2 libgfortran.3.dylib.gz2
mv libgfortran.3.dylib /usr/local/lib
</source>

3. Use macports to install gcc 4.4.2 and link the appropriate library ("ln -s /opt/local/lib/gcc44/libgfortran.3.dylib /usr/local/lib/libgfortran.3.dylib" ... on some machines, you may need "sudo ln -s /opt/local/lib/gcc44/libgfortran.3.dylib /usr/local/lib/libgfortran.3.dylib").

<source lang="bash">
ln -s /opt/local/lib/gcc44/libgfortran.3.dylib /usr/local/lib/libgfortran.3.dylib
sudo ln -s /opt/local/lib/gcc44/libgfortran.3.dylib /usr/local/lib/libgfortran.3.dylib
</source>

If you're curious, the problem is that APBS is dynamically linked, but Apple does not provide FORTRAN libraries.

The version of libgfortran above is covered by the GNU General Public License (GPL). A copy of the GPL may be found at [http://www.gnu.org/licenses/licenses.html], and the source may be obtained from MacPorts ([http://www.macports.org/]).

=== Tiger (10.4) ===
You'll need to install APBS yourself via MacPorts or via fink. Fink instructions may be found on the [[APBS]] page. Installation via MacPorts requires first installing MacPorts from [http://www.macports.org/] and then typing

<source lang="bash">
sudo port install apbs
</source>

from the command line. This process could easily take several hours on an older machine, as MacPorts will recompile gcc, gfortran, and several other packages along the way.